Preprints
https://doi.org/10.5194/essd-2023-265
https://doi.org/10.5194/essd-2023-265
25 Jul 2023
 | 25 Jul 2023
Status: a revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

A Global Gridded Dataset for Cloud Vertical Structure from Combined CloudSat and CALIPSO Observations

William Bertrand, Jennifer E. Kay, John Haynes, and Gijs de Boer

Abstract. The vertical structure of clouds has a profound effect on the global energy budget, the global circulation, and the atmospheric hydrological cycle. The CloudSat and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) missions have taken complementary, colocated observations of cloud vertical structure for over a decade. However, no globally-gridded dataset is available to the public for the full length of this unique combined data record. Here we present the 3S-GEOPROF-COMB product, a globally-gridded (level 3S) community data product summarizing geometrical profiles (-GEOPROF) of hydrometeor occurrence from combined (-COMB) CloudSat and CALIPSO data. Our product is calculated from the latest release (R05) of per-orbit (level 2) combined cloud mask profiles. We process a set of cloud cover, vertical cloud fraction, and sampling variables at 2.5, 5, and 10 degree spatial resolution and monthly and seasonal temporal resolution. We address the 2011 reduction in CloudSat data collection with Daylight-Only Operations (DO-Op) mode by subsampling pre-2011 data to mimic DO-Op collection patterns, thereby allowing users to evaluate the impact of the reduced sampling on their analyses. We evaluate our data product against CloudSat-only and CALIPSO-only global-gridded data products as well as a surface-based dataset, underscoring the added value of the combined product. Interest in the product is anticipated for the study of cloud processes, cloud-climate interactions, and as a candidate baseline climate data record for comparison to follow-up satellite missions, among other uses.

William Bertrand, Jennifer E. Kay, John Haynes, and Gijs de Boer

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-265', Anonymous Referee #1, 14 Aug 2023
  • RC2: 'Comment on essd-2023-265', David Winker, 03 Oct 2023
  • AC1: 'Response to reviewers', William Bertrand, 01 Nov 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-265', Anonymous Referee #1, 14 Aug 2023
  • RC2: 'Comment on essd-2023-265', David Winker, 03 Oct 2023
  • AC1: 'Response to reviewers', William Bertrand, 01 Nov 2023
William Bertrand, Jennifer E. Kay, John Haynes, and Gijs de Boer

Data sets

3S-GEOPROF-COMB: A Global Gridded Dataset for Cloud Vertical Structure from combined CloudSat and CALIPSO observations William Bertrand, Jennifer E. Kay, John Haynes, and Gijs de Boer https://zenodo.org/record/8057791

William Bertrand, Jennifer E. Kay, John Haynes, and Gijs de Boer

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Short summary
The vertical structure of clouds has a profound effect on global energy flows, air circulation, and the hydrologic cycle. Two satellite instruments, CloudSat radar and CALIPSO lidar, have taken complementary measurements of cloud vertical structure for over a decade. Here we present the 3S-GEOPROF-COMB product, a globally-gridded satellite data product combining CloudSat and CALIPSO observations of cloud vertical structure.
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